blob: cc9f9250b5a0048bb20232514dd994d45517d2e5 [file] [log] [blame]
package cdn
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import (
"database/sql"
"errors"
"net/http"
"strings"
"github.com/apache/trafficcontrol/lib/go-tc"
"github.com/apache/trafficcontrol/lib/go-util"
"github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/api"
"github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/util/monitorhlp"
)
func GetHealth(w http.ResponseWriter, r *http.Request) {
inf, userErr, sysErr, errCode := api.NewInfo(r, nil, nil)
if userErr != nil || sysErr != nil {
api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr)
return
}
defer inf.Close()
health, err := getHealth(inf.Tx.Tx)
if err != nil {
api.HandleErr(w, r, inf.Tx.Tx, http.StatusInternalServerError, nil, errors.New("getting cdn health: "+err.Error()))
return
}
api.WriteResp(w, r, health)
}
func GetNameHealth(w http.ResponseWriter, r *http.Request) {
inf, userErr, sysErr, errCode := api.NewInfo(r, []string{"name"}, nil)
if userErr != nil || sysErr != nil {
api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr)
return
}
defer inf.Close()
health, err := getNameHealth(inf.Tx.Tx, tc.CDNName(inf.Params["name"]))
if err != nil {
api.HandleErr(w, r, inf.Tx.Tx, http.StatusInternalServerError, nil, errors.New("getting cdn name health: "+err.Error()))
return
}
api.WriteResp(w, r, health)
}
func getHealth(tx *sql.Tx) (tc.HealthData, error) {
monitors, err := monitorhlp.GetURLs(tx)
if err != nil {
return tc.HealthData{}, errors.New("getting monitors: " + err.Error())
}
return getMonitorsHealth(tx, monitors)
}
func getNameHealth(tx *sql.Tx, name tc.CDNName) (tc.HealthData, error) {
monitorURLs, err := monitorhlp.GetURLs(tx)
if err != nil {
return tc.HealthData{}, errors.New("getting monitors: " + err.Error())
}
monitors, ok := monitorURLs[name]
monitorURLs = nil
if ok {
monitorURLs = map[tc.CDNName][]string{name: monitors}
}
return getMonitorsHealth(tx, monitorURLs)
}
func getMonitorsHealth(tx *sql.Tx, monitors map[tc.CDNName][]string) (tc.HealthData, error) {
client, err := monitorhlp.GetClient(tx)
if err != nil {
return tc.HealthData{}, errors.New("getting monitor client: " + err.Error())
}
totalOnline := uint64(0)
totalOffline := uint64(0)
cgData := map[tc.CacheGroupName]tc.HealthDataCacheGroup{}
for cdn, monitorFQDNs := range monitors {
success := false
errs := []error{}
for _, monitorFQDN := range monitorFQDNs {
crStates, err := monitorhlp.GetCRStates(monitorFQDN, client)
if err != nil {
errs = append(errs, errors.New("getting CRStates for CDN '"+string(cdn)+"' monitor '"+monitorFQDN+"': "+err.Error()))
continue
}
crConfig, err := monitorhlp.GetCRConfig(monitorFQDN, client)
if err != nil {
errs = append(errs, errors.New("getting CRConfig for CDN '"+string(cdn)+"' monitor '"+monitorFQDN+"': "+err.Error()))
continue
}
cgData, totalOnline, totalOffline = addHealth(cgData, totalOnline, totalOffline, crStates, crConfig)
success = true
break
}
if !success {
return tc.HealthData{}, errors.New("getting health data from all Traffic Monitors failed for CDN '" + string(cdn) + "': " + util.JoinErrs(errs).Error())
}
}
healthData := tc.HealthData{TotalOffline: totalOffline, TotalOnline: totalOnline}
for _, health := range cgData {
healthData.CacheGroups = append(healthData.CacheGroups, health)
}
return healthData, nil
}
// addHealth adds the given cache states to the given data and totals, and returns the new data and totals
func addHealth(data map[tc.CacheGroupName]tc.HealthDataCacheGroup, totalOnline uint64, totalOffline uint64, crStates tc.CRStates, crConfig tc.CRConfig) (map[tc.CacheGroupName]tc.HealthDataCacheGroup, uint64, uint64) {
for cacheName, avail := range crStates.Caches {
cache, ok := crConfig.ContentServers[string(cacheName)]
if !ok {
continue
}
if cache.ServerStatus == nil || *cache.ServerStatus != tc.CRConfigServerStatus(tc.CacheStatusReported) {
continue
}
if cache.ServerType == nil || !strings.HasPrefix(string(*cache.ServerType), string(tc.CacheTypeEdge)) {
continue
}
if cache.CacheGroup == nil {
continue // TODO warn?
}
cgHealth := data[tc.CacheGroupName(*cache.CacheGroup)]
cgHealth.Name = tc.CacheGroupName(*cache.CacheGroup)
if avail.IsAvailable {
cgHealth.Online++
totalOnline++
} else {
cgHealth.Offline++
totalOffline++
}
data[tc.CacheGroupName(*cache.CacheGroup)] = cgHealth
}
return data, totalOnline, totalOffline
}